Compound-valve pump or motor



W. F. MAYER.

COMPOUND V ALVE'PUMP OR MOTOR. APPLICATION man NOV. [2, .1919.

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W. F. MAYER. v

COMPOUND VALVE PUMP 0R MOTOR.

APPLICATION man NOV-12,1919.

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INVENTOR. fi'lw'ewar FMa yer ATTORNEY.

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PATENT QFFEQE.

, OF HIGH BRIDGE, NEW JERSEY, A COR- COMPOUND-VALVE norm on. Moron.

Specification of Letters Patent.

Patented May 2, 1922.

Application filed November 12 1919. Serial No. 337,425.

T 0 all whom it may concern:

Be it known that I, WALDEMAR F. MAYER, a citizen of Switzerlano, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Compound-Valve Pumps or Motors,'of which the following is a specification.

This invention relates to a compound valve pump or motor, wherein the pump is effectively balanced, the fluid ports are shortened, and the number of parts reduced by using compound valves, each serving two plungers simultaneously.

The invention is illustrated in the accompanying drawings, wherein Fig. l is a vertical sectional View of the improved pump.

F ig. 2 is a sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a sectional view on the line 33 of Fig. 1.

Fig. 4 is a sectional view of the compound valve.

Fig. 5 is a sectional View of the valve bushing.

Fig. 6 is an; elevation of the oscillating cylinder.

The improved pump 10 is mounted on a base. 11, formed hollow to serve as an oil reservoir, the lower parts of the pump projecting into such reservoir, and the same being provided with openings 12 at the ends, closed by covers 13, whereby such lower parts of the pump are accessible.

1 The pump shaft 14, supported in bearings 15 rising from the base, is driven through an intermediate coupling 16, from a prime mover 17. The pump casing 18 is supported on the base 11, and is mounted concen-- trio with the shaft 14. This casing is divided by a central transverse partition 19 into two concentric chambers 20 and 21, having appropriate pipe outlets 22 and 23, respectively. Either chamber may constitute the pressure chamber, in which event the pipe outlet therefrom becomes the pump delivery, while the pipe to the other chamber becomes the pump inlet or suction.

The pump caslng is provided at appropriate points with openings or bores 24, opening into both chambers, and valve bushings 25 are forced into these bores. These bushings, as shown more particularly in Fig.

5, are cylindrical in form, having upper and lower central openings 26, communicating with the respective chambers of the casing, and lower openings 27, with the pump cylinders. The pump cylinders are hollow bodies 28 to receive the plungers 29, and have ring heads 30 to snugly fit the ends of the bushing 25 beyond the casing. -The cylinders are thus rotatively supported on the bushings, to permit the necessary oscillation of the cylinders in the op eration of the pump.

A compound valve 31 is mounted for rotation in each bushing, such. valve, as shown in Fig. 4, having closed ends, with upper and lower centralopenings 32, 33, and upper and lower end openings 34. 35. nal partition 36 closes one opening at the central portion, as32, against the other as 33, so that the motive fluid may be directed from a pump cylinder through one end opening as 34, and into a particular chamber of the casing, and from the other chamber of the casing, through the other central opening and out the other end opening. The ends of the valves are provided with connecting pins 37, arranged in opposed eccentric relations to the rotative axis of the valve.

Plungers 29 are arranged in the cylinders, and it will be noted that the cylinders are arranged in pairs, radially of the-pump shaft. The plungers of the cylinders on each side of the casing are driven through connection with a ring 38, bearing on and operated through an eccentric 39, mounted for free rotation on the pump shaft 14. Means are provided whereby the eccentricity may be. varied, through the adjustment of such eccentrics about the shaft 14. For this purpose the relative inner ends of the eccentrics are provided with gear racks 40, engaged by pinions 41, and the latter are simultaneously and similarly operated through engagement therewith of a toothed rack 42, slidably mounted in a longitudinal bore of the shaft 14. The free end of the rack 42 extends beyond the end of the shaft and is provided with a grooved collar 43, engaged by the forked end of a lever 44, fulcrumed on the base. By suitably operating the lever, the eccentrics may be rotated on the shaft, to obviously change the throw of the plungers at a particular point.

The valves 31 are rotated at the Speed of PENNSYLVANIA, ASSIGNOR TO TAYLOR- I for communication A diagothe pump shaft it, through eccentrics 45 on said shatt and spiders connected to the pins 37 on the valves. lhe de ree of eccentric parallel in any positions of the parts.

lit will be noted that the plunger-operating eccentrics can be shifted through the means described to any equal amount out of central position while the pump shaft is in operation, and that this movement of these eccentrics while simultaneous is in opposite directions.

By using one of the casing and another set on the other, with the two sets equally spaced, so that one pair is always in=the plane of the pump shaft center line, and operating the plungers of the respective pair in opposite directions, the efi'ect as to evenness of delivery is the same as operating all the plungers equally spaced in one plane and from one eccentric.

. The pump operation, following the action of one pair of cylinders, .is as follows: Assuming the cylinder to the left of the casing to have reached the dead center position shown, it will be noted that the plunger to p the rightis at the opposite dead center position. The compound valve is then in a position shutting oil communication between 3 both of said cylinders and the chambers of the pump casing.

if the pump is assumed to move clockwise, viewed from the left, the plunger to the left, before it has reached t e dead center positionshown is moving upward, while the plunger to the right is moving downward. During this movement, the compound valve will have been turned to cause the motive fluid from 'the left-hand cylinder to be forced into its appropriate chamber of the pump casing, and at the same time permit the motive fluid to be drawn through such valve from the other chamber of the casing into the righthand cylinder. One'half of the compound valve is thus underpressure and-the other half under no pressure for one half turn of the pump shaft, and the conditions exactly rfiversed for the other half turn of the pump s aft.

Having thus described the invention, what is claimed as new, is

i. A pump having a two chamber casing, a pair of cylinders, opposite acting plungers set of plungers on one side I inmost in the cvlinders, and a single rotary valve for connecting the respective c linders in subcession with the respective c ambers of the casing.

2. A pump having a casing, cylinders arranged 1n pairs, a valve for controlling the communication of each pair of cylinders with the respective chambers of the casing, plungers in the'cylinders, eccentrics for operating the 'plungers, and an eccentric for operating the valve.

3. A pump comprising .a two chamber casing, cylinders in opposed pairs on opposite sides of the casing, a valve bushing mounted in the casing and supporting the cylinders of each pair for oscillatiom and a single compound valve rotatable in the bushing and controlling both chambers of the I casing with respect to the cylinders of each pair. I p I d. A pump comprising .a! two chamber casting, cylinders arranged. inopposed pairs on opposite sides of the casing, a single compound valve controlling the communication of the respective cylinders with the respective "chambers of the casing, plungers in the cylinders, and means for operating the plungers and valve from a single rotative source.

5. A pump comprising a two chamber casing, cylinders in opposed pairs on opposite sides of the casing, plungers in the re spective cylinders, mean'sfor operating the plungers of each pair in opposite directions with one pair alwa s in the plane of the pump shaft center hue.

6. A pump comprising a two chamber caaing, cylinders in opposed pairs on opposite sides of the casing, and a single compound valve rotatable with respect to the cylinders and to the casing for controlling both chambers of the casing with respect to the cylinders of each pair.

7. A pump comprising a pump shaft, a

casing arranged concentric with the shaftwannnnan r. Maren. 

